4220 beadm mount of old BE with zones fails "Read only filesystem"
4235 beadm(1M) mount options undocumented in man page

*** 1,8 ****
  '\" te
  .\" Copyright 2013 Nexenta Systems, Inc. All rights reserved.
! .TH BEADM 1M "Jul 25, 2013"
  .SH NAME
  beadm \- utility for managing zfs boot environments
  .SH SYNOPSIS
  .LP
  .nf
--- 1,8 ----
  '\" te
  .\" Copyright 2013 Nexenta Systems, Inc. All rights reserved.
! .TH BEADM 1M "Nov 11, 2013"
  .SH NAME
  beadm \- utility for managing zfs boot environments
  .SH SYNOPSIS
  .LP
  .nf
*** 27,37 ****
  \fBbeadm\fR \fBlist\fR [\fB-a\fR | \fB-ds\fR] [\fB-H\fR] [\fB-v\fR] [\fIbeName\fR]
  .fi
  
  .LP
  .nf
! \fBbeadm\fR \fBmount\fR [\fB-v\fR] \fIbeName\fR \fImountpoint\fR
  .fi
  
  .LP
  .nf
  \fBbeadm\fR \fBunmount\fR [\fB-fv\fR] \fIbeName\fR | \fImountpoint\fR
--- 27,37 ----
  \fBbeadm\fR \fBlist\fR [\fB-a\fR | \fB-ds\fR] [\fB-H\fR] [\fB-v\fR] [\fIbeName\fR]
  .fi
  
  .LP
  .nf
! \fBbeadm\fR \fBmount\fR [\fB-s\fR \fBro\fR|\fBrw\fR] [\fB-v\fR] \fIbeName\fR \fImountpoint\fR
  .fi
  
  .LP
  .nf
  \fBbeadm\fR \fBunmount\fR [\fB-fv\fR] \fIbeName\fR | \fImountpoint\fR
*** 405,422 ****
  .RE
  
  .sp
  .ne 2
  .na
! \fBbeadm\fR \fBmount\fR [\fB-v\fR] \fIbeName\fR \fImountpoint\fR
  .ad
  .sp .6
  .RS 4n
  Mounts a boot environment named beName at mountpoint.  mountpoint must be an
  already existing empty directory.
  .sp
  .ne 2
  .na
  \fB-v\fR
  .ad
  .sp .6
  .RS 4n
--- 405,431 ----
  .RE
  
  .sp
  .ne 2
  .na
! \fBbeadm\fR \fBmount\fR [\fB-s\fR \fBro\fR|\fBrw\fR] [\fB-v\fR] \fIbeName\fR \fImountpoint\fR
  .ad
  .sp .6
  .RS 4n
  Mounts a boot environment named beName at mountpoint.  mountpoint must be an
  already existing empty directory.
  .sp
  .ne 2
+ .na
+ \fB-s\fR \fBro\fR|\fBrw\fR
+ .ad
+ .sp .6
+ .RS 4n
+ Mount the shared filesystems of the BE in read-only or read-write mode.
+ .RE
+ .sp
+ .ne 2
  .na
  \fB-v\fR
  .ad
  .sp .6
  .RS 4n